Means for mounting bearings on arbors in multiple



Dec. 30, 1930. L. c. BLOMSTROM MEANS FOR MOUNTING BEARINGS ON ARBORS IN MULTIPLE Filed Aug. 6, 1927 2 Sheets-Sheet l E w @N INVENTOR ATTQRN EYS Dec. 30, 1930. L. c. BLOMSTROM 32959 BEARINGS ON ARBORS IN MULTIPLE MEANS FOR MOUNTING 2 Sheets-Shset Filed Aug. 6, 1C2? INVENTOR ATTORNEYS Fatented Dec. 3%, lfi fi C. BLOLIS'EROM, OF DETBOE'IJ, IVXICEIGAIT, T0 FEDERAL IVIOGUL CORPO- RATIGN, 015 DETROIT, IEICHIGELN, A CORPORATION OF lFiEICZIIGAN MEANS FOR LIO'UIITING BEAR-HRTGS 0N ARBOR/S IN MULTIPLE A plication filed August 6, 1353 This invention relates to means for mounting in multiple, for either continuous or raoidl successive 'rindin or similar sho operations, either whole bearings or half bearings, and has for its object an improved organization of parts by means of which the individual articles to be worked upon may be rapidly and firmly clamped about or released from a holding arbor designed to be positioned in suitable relation to the cutting tool or tools.

In the drawings: a

Figure 1 is an elevational view lengthwise of the arbor with the supporting frame "for convenient assemblage purposes shown in dotted lines.

Figure 2 is a sectional elevational view taken from the same position as Figure 1.

Figure 3 is'an end elevational View of the arbor in relation to the support whose position is indicated in dotted lines.

Figure 4 is a cross sectional view taken along the line 44 of Figure 1.

Figure 5 is a similar view taken along the line 55 of Figure 1.

Figure 6 is a sectional detail showin a desirable though not indispensible variation in the angularity of the engaging edge of one of the clamps.

Figure 7 is an elevational view partly in section of a modified form of clamp, showing the possible engagement of its holding faces with a terminally flanged bearing shell.

12 represents a bench assemblage frame, in the suitably recessed top portion of whose uprights are designed to be temporarily rested and held against rotation the ends 14 of the bearing arbor 13. The base memberof this arbor consists of a cylindrical or solid shaft member, provided at its ends justinside the tips 14 with screw threaded surfaces 15, the pitch of the threading at one end being of opposite inclination to thaton the other end. Overengaging these threaded surfaces of the arbor are terminal clamp members 16 provided with internal threadings of complementary pitch, each of these clamp l11111 bers being adapted to be rotatably actuated about the arbor 13 by means of a wrench or similar tool placed upon the wrench holds Serial No. 211,088.

17. As brought out particularly in sectional igure 2, the inwardly facing or bearing dges of these clamping members are preferably bevelled or similarly contoured, as at 8, to provide for a seizing overengagement 'ith the adjacent bevelled edges of "full bearings 19 Or half bearings 20 which may be mounted upon the arbor. The length of the arbor may be such that any desired number of bearings or half bearings can be clampin ly mounted in position thereon for presentation either consecutively or successively to the action of a machining tool upon their outer curved surfaces, the individual bearings being suitably spaced from one another as well as clampingly held by the alternating collars 21.

he bare arbor which is to be loaded first has one of the terminal clamping members removed from its end only if cylindrical bearing shells are to be mounted thereon, and there are then slipped or positioned over it, in alternation, bearing shells and these holding collars, the first bearing shell, as for example, that occupying the space Y, being pushed along the arbor until it engages t bevelled holding edge 18 of that one of terminal clamping members still remaing thereon. One of th collars, as 21, is ien slipped onto the arbor and pushed into ogagement with the opposite edge or end of bearing shell or pair of bearing shells rroin that engaged by the bevelled edge 18 oi the holding clamp. Then another shell, as forexainple Z, sli'oned over th arbor and against the opposite end 'or edge of the collar 21 from that which engages the first inserted shell Y, then another bearing shell is slipped over the arbor, and so on until it has been loaded to its full capacity, when the primarily removed second terminal clamp member is replaced in position. and by means of wrench hold action described, the several arbor-supporting elements are forced into intimate and tightly holding association with one another, the rotative movement of the arbor being prevented as already described by its engagement with the squared recess in the top of the frame 12. The arbor with its load is then removed and placed in the the be y of the arbor, brought out in F igure 1-, there are slight spaces, as X, between their n'iceting edg but the clamping effect of the holding collars or as to the bearings at either end of the group mounted upon the arbor, of the bevelled edges 18 of the terminal clamp members so tight that they are firmly d in posi .,.i so that the machining of their outer surfaces can be proceeded with in substantially the same manner as in the case of the whole bearings already described.

In case, however, only half bearings are to be mounted in each of the spaces intermediate the holding collars 21, it is advisable to provide means for halting rotative movement of the half bearing about the arbor under the intense fraeti nal actuation of the grinding tool it is applied to the outer surface of the bearing. To this end the arbor is provided at suitable intervals along its length with transverse holes or bores 23 and 24-, located axially perpendicular to one another. In one of these, as 28, engages the slightly movable detent piece 25, which is provided with marginal lips 26, and which is adapted to be actuated limitedly across the axial line of the arbor as a whole by action of the screw 27. Since this latter, in addition to this holding against rotation, is held by the engagement againstits marginal edges of two of the various holding elements already (lcscribed, the bearing is very eliiciently held against undesired rotation: and when the detent 25 is driven to its seated or holding position, the outer corner or tip of its flange lies f r enough within the ring of possible cut by the grinding apparatus so as not to be touched thereby. It will be noted in Figure 2 that the bearings c, and b there represented are. either full hearings or pairs of half bearings such as are illustrated in sectional Figure l, thus completely encircling the arbor, and not requiring the action of the detent piece and screw 27, whereas the bearings 0, (Z and e, similarly shown in dottet lines, only extend about the lower half of the arbors surface. The position of the straight edges of these half bearings relatively to the arbor a whole is indicated by the full lines 26 on those portions of Figure 1 representing the position of bearings c, (l, and e thereon, is well as being suggested by the absence of the dotted line representation of the bearing shell at the bottom of Figure 2, opposite the half bearings 0, (Z and e.

To com )(31 t f 1' 30s 'bl va-iation. i

isaeo siei $11 the angularity of the bevelled edges of the bearing shells, as a result of a previous machining operation not here in question, it is often advisable to provide the bevelled edges 18 of the terminal clamping members with a slightly different angular inclination from the expected bevelled edge of the shells, so that in case of any variation therefrom, the relatively hard metal formation of the clamping mel'nbers and the collars 21 of which it is composed will very slightly dig into the relatively soft metal of the bearing shell sufiiciently, though non-injuriously to afford firm holding engagement of the bearing shell on the arbor. This is brought out at 28 and 29 in Figure 6. y

The idea mentioned in the paragraph just preceding, as to the slight possible cutting in of the hard metal of the bearing clamp as contrasted with the soft metal of the bearing shell, is illustrated as to a possible further modification of construction in F igure 7, wherein the companion members 30 and 31 of a single rather than multiple shell-handling device are provided with suitable bevelled faces, as 32 and 33, adapted to be pressed into clamping engagement with the flanged edges 34 of a bearing shell 35 which thus differs from the plain bearing shell 19, illustrated in Figures 1 and 2. The lengthwise projection of the clamp piece 31 along the arbor 36 is provided for by a wrench hold 37 and screw threadings 38 similar to those described as to the form of construction in F ignres 1 and 2. The intermediate space on the outer surface of the bearing shell whose grinding is to be undertaken is not, however, overengaged by the bevelled flanges 32 and 33 in a way or to an extent that will prevent adequate access of the grinding tool to that portion of the shells surface bounded by the projecting or flanged end portions.

lVhile it will be apparent that the illustrated embodiments of my invention herein disclosed are well calculated to adequately fulfill the objects and advantages primarily stated, it is to be understood that the invention is susceptible to variation, modification and change within the spirit and scope of the subjoined claims.

hat I claim is:

1. In combination with an arbor provided with oppositely threaded portions adj acent its ends, a supporting frame provided with terminal abutments having seats wherein the ends of said arbor may be temporarily and non-rotat-ably positioned, a plurality of annular members adapted to be positioned about said arbor in alternating relation with bearing shells whose firm positioning for ma chining treatment is desired, and threaded terminal clamp members operatively engaging the correspondingly threaded portions of said arbor and adapted to be moved toward and away from one another by induced rotative actuation lengthwise of said arbor, thereby forcing them and said annular members into marginal holding engagement with the edges of their adj acently positioned bearing shells, and holding the latter in temporarily immobile relation about the arbor.

2. In combination with a terminally threaded arbor and complementarily threaded clamping members operatively positioned thereon, the inwardly facing edges of said clamping members being undercut from true right angularity to provide diversely contoured frictional surfaces from the marginal edge portions of the blanks which they are adapted to engage, a plurality of annular shell-engaging members removably engaging over the intermediate portion of the arbor in alternating relation with hearing shells, with the ends of which they are adapted to be forced into firm holding relation by the induced axially lengthwise movement of said clamping members toward one another and against the overengaged marginal edges of the adjacent blanks upon the threaded ends of the arbor.

3. In combination with an arbor and removable clamping members operatively engaging the end portions thereof, a plurality of annular members adapt-ed to be positioned on said arbor in alternating relation with cylindrical or semi-cylindrical bearing shells positioned thereabout, all of which are adapted to be forced into tight engagement with one another by the actuated movement of one of said clamping members toward the other clamping member, and means carried by said arbor and adapted to be selectively forced into operative relation with half bearing shells positioned on the arbor, whereby, in addition to the described clamping of their terminal edges, they are held against rotative movement about the arbor l. The combination, with an arbor member, and removable clamping members operatively engaging the end portions thereof, of a plurality of annular members adapted to be positioned about the intermediate portion of said arbor member in alternating relation with bearing shells alsopositioned thereon, all of the elements positioned on said arbor being adapted to be forced into temporarily immobile relation to one another by the ac tuated movement of one or the other of said clamping members along the arbor toward the other clamping member, and means for holding such of the bearing shells as are semicylindrical against; rotativei movement relatively to the arbor. j

5. In combination with an arbor provided with removable terminal clamping members capable of limited operative movement lengthwise thereof, annular elements adapt ed to be arranged along the intermediate por tion of said arbor in alternating relation with bearing shells positioned thereupon, all of such elements being adapted to be forced into close marginal engagement with-those adjacent on either side by the actuated movement of one of said clamps along said arbor toward the other clamp member, and means carried by said arbor and adapted to be moved into position of operative engagement with such of the bearing shells as are semicylindrical, whereby such shells are held against rota-tive movement about said arbor.

6. In combination with an arbor having threaded end portions, terminal clamping members operatively' engaging the threaded ends of said arbor, and a plurality of annular members slidably engaging about the inte"- mediate portion of said arbor, the inwardly facing edges of said clamping members and each edge of each annular member being adapted to operatively engage the edge portions of half-bearing shells interposed between them on the arbor, all of the parts thus assembled'on the arbor being adapted to be forced into operative engagement with one another by the suitably actuated movement of one of said terminal clamping members towardthe other.

7, In combination with an arbor about whose central portion a plurality of bearing shells and clamping rings are adapted to be alternatingly positioned, means operatively connected with the unoccupied end portions of said arbor whereby the adjacent edge portions of the several alternated elements positioned thereon may be forced into firm engagement with one another, and normally inactive means adapted to act transversely of the axis of the arbor whereby such of said bearing shells as are only of substantially semi-circumferential extent are also held against rotative movement relatively to the arbor while being acted upon by an external machining element.

8. In combination with an arbor, terminally positioned members capable of limited movement lengthwise thereof, a plurality of annular clamping members adapted to be projected by the actuated movement of said terminally positioned members into marginal holding engagement by their edge portions with the corresponding and adjacent portions of bearing blanks alternated therewith along said arbor, and supplemental holding members contained within the body of the arbor and adapted to move transversely of the axis thereof, adapted to be active only when the bearing blanks positioned opposite them are of substantially semi-cylindrical contour, to hold such blanks against rotative movement about the arbor while being operated upon by an external machining element.

9. In combination with an arbor provided with threadings adjacent its ends, terminal clamp members operatively engaging said threaded portions of said arbor, the interiorly facing edges of said clamp members being overengagingly contoured for seizure of the adjacent marginal edges of the end units or a group of bearing shells positioned about said arbor, and annular spacing members positioned on said arbor in alternating relation with said bearing shells and adapted to marginally engage said bearing shells when forced into close association with one another by actuated movements of said terminal clamp members toward one another along said arbor.

10. The combination with an arbor l1aving threadings adjacent its ends, of aseries of annular spacing members positioned about the intermediate portion of the arbor in alternated relation with a group of bearing shells Whose firm temporary tenure While being machined is desired, and a pair of terminal clamp members provided with threadings which effect an adjustable operative relation between each member and its corresponding threaded portion of the arbor, whereby the alternated spacing members and bearing shells positioned upon said arbor may be forced into non-rotatable marginal engagement with one another by the manually actuated movement of said clamp members toward one another along said arbor.

11. In combination with a terminally threaded arbor member and a pair of cone spondingly threaded terminal clamp members operatively positioned thereon in position of potential movement toward and away from one another therealong, the interiorly facing ends of said terminal clamp members being formed for overengaging seizure of the adjacent marginal edges of the adjacent members of a group of bearing shells temporarily positioned upon said arbor, and a series of annular spacing members carried by said arbor in alternating relation to the bearing shells, each of said recited parts upon said arbor being adapted to be forced into non-rotatable marginal engagement with those adjacent it by the actuated movement of said terminal clamping members toward one another. I

In testimony whereof I sign this specification.

LOWELL C. BLOMSTROM. 

